Question

select isoelectronic species from following :O-, F-, Na+, Mg+
​

Answer 1

Answer:

Na⇒1s

2

,2s

2

2p

6

,3s

1

Na

+

⇒1s

2

,2s

2

2p

6

similarly for Mg

2+

⇒1s

2

,2s

2

2p

6

Na

+

,Mg

2+

, are isoelectronic species. They contain 10 electrons each.

S

2−

⇒1s

2

,2s

2

2p

6

,3s

2

3p

6

Ar⇒1s

2

,2s

2

2p

6

,3s

2

3p

6

K

+

⇒1s

2

,2s

2

2p

6

,3s

2

3p

6

Ca

2+

⇒1s

2

,2s

2

2p

6

,3s

2

3p

6

Ar,S

2−

,Ca

2+

andK

+

are isoelectronic species. They contain 18 electrons each.

I hope my answer helps you☺☺

Answer 2

Answer:

F- and Na+ are isoelectronic species.

Explanation:

Isoelectronic species : Those ions, atoms or molecules which have the same number of electrons are known as isoelectronic species. They may have different numbers of protons and neutrons but the number of electrons will be the same.

For example - Fluoride ion (F-) and Sodium ion are isoelectronic species. Fluorine contains 9 electrons , it accepts one electron and turns into fluoride ion. Total number of electrons in fluoride ion is 10. In the case of Sodium ions, the total number of electrons is also 10. So, both ions have same number of electrons and they are isoelectronic species

.